keller



(No Model.)

A. L. KELLER.

PENDANT STEM FOR WATCHES.

Patented Dec. 7, 1886.

' 25 the case.

UNITED STATES PATENT -OFFICE.

ABRAHAM L. KELLER, OF ELGIN, ILLINOIS, ASSIGNOR OF ONE-THIRD TO OTTQ JOHNSTON, OF SAME PLACE.

PEN DANT-STEM FOR W ATCH ES.

. SPECIFICATION forming part of Letters Patent No. 353,749, dated December 7, 1886.

' Application filed February 23, 1886. Serial No. 192,960. (No model.)

To all whom it may concern Be it known that l, ABRAHAM L. KELLER, a citizen of the United States, residing at Elgin, in the county of Kane and State of Illinois, have invented a new and useful Improvement in Crown-Stems for Steminding and Hand- Setting Watches, of which the following is a specification.

My invention relates to improvements in stem winding and hand-setting mechanism for watches, in which the crown-stem is made in two sections; and it consists in having the section with theknob provided with a square hole in the end of its stem part, and a suitable spring with a catch secured to said stem, and having its catch arranged to project into said square hole to engage the other section of the stem, in the manner hereinafter specified.

The objects of my improvements are, first, to

. provide means whereby the works of the watch can be taken out of the case without taking it apart; second, a stem that can readily be adapted to the common pendant setting watches, and to facilitate the removal of the works from I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure l is a longitudinal section of my improved mechanism, and Figs. 2 and 3 are de tail parts of the same.

Similar letters of reference refer to similar parts throughout the several drawings.

In the drawings, k is a section of the watchcase with the pendant Z attached, into which is 5 fitted my improved crown-stem a and b. The section 66, forming the crown-knob, is provided with a groove, it, into which enters the stopscrew t, and determines the endwise movement of the crown-stem when the same is operated in winding up the watch or setting the hands, as the case may be. The end of this stem is provided with a square hole, and at its side is provided with a spring, 0, having a hook at its end, which projects at a short distance from the end of the stem into the square hole. (See Fig.

2.) The section b has its end to correspond with the square hole of section a, and is provided with a catch or notch, f, to engage the hook on the end of the spring 6, and thus hold the two sectionsa and 21 coupled. A collar, near the other end of section b is provided, which operates in conjunction with a suitable lever, d, or its equivalent, whereby the setting and winding mechanism is manipulated. A bevel-pinion,c,is also provided',which fits upon the square beyond the collar. This bevel-pinion gears with the gear of the winding and handsetting mechanism.

When it is necessary to remove the watch or works from the case,the stop-screw z" is screwed back until the crown-stem is free from said screw. The stem can now be pulled out until the part b is drawn from the bevel-pinion c.

The watch or works can now be removed from the case withouttaking it apart. The stem 6 part1) can now readily be removed from the knob-section c by uncoupling it. This is done by lifting the spring-hook e. WVith this construction any style of stem-winding watch that will fit the case can be used by simply provid- 7o ing a suitable stemsection, b. It obviates the use of the crown without a stem-winding movementin case a key-winding movement is desired for the same case,instead ofastem-winding movement. 7 Having now fully described my invention, what I desire to secure by Letters Patent is- 1. In a pendant-winding and hand-setting watch, a crown-stem made in two sections, the crown or knob section provided with a springhook, e, and its pinion-section provided with a square and notch to couple with the-crownsection, in the manner shown, for the purpose set forth.

2. In a pendant-winding and handsetting watch, a crown-stem made in two sections, the crown or knob section having asquare hole in its end and a transverse kerion its side,near its end, to admit of the spring-hook c.

3. In a pendant-winding and hand-setting 0 watch, a crown-stem made in two sections and having a spring provided with a hook for coupling the two sections together, in the man ner and for the purpose set forth.

i. In a pendant-winding and hand-setting 5 watch,a crown-stem made in two sections,hav-

ing the crown or knob section provided with a groove, h, to determine the endwise 111OVG- bevel-pinion c, and lever (1, these members being constructed and arranged for the purpose ment of the stem, operating in conjunction specified.

with a set-screw in the ring-pendant. A. L. KELLER. w 5 5. The combination, substantially as here- XVitnesses:

inbefore set forth, of a crownstein made in two OTTO J OHNSTON, sections, a and b, the spring 6, set-screw i C. F. IRWIN. 

